393280845 has 8 divisors (see below), whose sum is σ = 629249376. Its totient is φ = 209749776.

The previous prime is 393280837. The next prime is 393280931. The reversal of 393280845 is 548082393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 393280845 - 2³ = 393280837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 393280797 and 393280806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13109347 + ... + 13109376.

It is an arithmetic number, because the mean of its divisors is an integer number (78656172).

Almost surely, 2^393280845 is an apocalyptic number.

It is an amenable number.

393280845 is a deficient number, since it is larger than the sum of its proper divisors (235968531).

393280845 is a wasteful number, since it uses less digits than its factorization.

393280845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26218731.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 393280845 is about 19831.3097146911. The cubic root of 393280845 is about 732.6573848278.

The spelling of 393280845 in words is "three hundred ninety-three million, two hundred eighty thousand, eight hundred forty-five".